Medicine cabinet installation instructions 3 2. install the top clips by inserting the rounded end into the slot on the back of the cabinet. 3. arrange the top clips on each side as shown in the image below. 4. drive the 1-1/2" screws through the top clips into the wall. surface mount installation 1., step-by-step installation instructions for kohler surface-mount aluminum-frame medicine cabinets.. A look at kohler mirrored cabinets, including an installation demonstration. this feature is not available right now. please try again later.